New driving scheme to improve hysteresis characteristics of organic thin film transistor-driven active-matrix organic light emitting diode display

Toshihiro Yamamoto, Yoshiki Nakajima, Tatsuya Takei, Yoshihide Fujisaki, Hirohiko Fukagawa, Mitsunori Suzuki, Genichi Motomura, Hiroto Sato, Shizuo Tokito, Hideo Fujikake

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A new driving scheme for an active-matrix organic light emitting diode (AMOLED) display was developed to prevent the picture quality degradation caused by the hysteresis characteristics of organic thin film transistors (OTFTs). In this driving scheme, the gate electrode voltage of a driving- OTFT is directly controlled through the storage capacitor so that the operating point for the driving-OTFT is on the same hysteresis curve for every pixel after signal data are stored in the storage capacitor. Although the number of OTFTs in each pixel for the AMOLED display is restricted because OTFT size should be large enough to drive organic light emitting diodes (OLEDs) due to their small carrier mobility, it can improve the picture quality for an OTFT-driven flexible OLED display with the basic two transistor-one capacitor circuitry.

Original languageEnglish
Article number024201
JournalJapanese journal of applied physics
Volume50
Issue number2
DOIs
Publication statusPublished - 2011 Feb
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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